Vol.58.] | THE FOSSILIFEROUS SILURIAN BEDS OF KERRY. 257 
and green calcareous flags often very fossiliferous, and containing in 
places abundant Dayia navicula, Sow., and coral-layers composed of 
Helrolites and Halysites. These beds are certainly not less than 
900 feet thick, and may be much thicker. The only sign of con- 
temporaneous volcanic action having taken place during their 
deposition, is afforded by certain thin beds of ash seen north- 
east of Carhoo and east of Clogher village. The great majority 
of the inland exposures of Silurian beds belong to this series, and, 
as already stated, we believe that the series of gritty flags and slates 
exposed on the south side of Trabaneclogher are also to be grouped 
with the Croaghmarhin Beds, and regarded as of Ludlow age. 
4, Below comes a series of beds which, from the fact that they are 
best developed at Drom Point, may becalled the Drom-Point Beds. 
They consist of brown gritty and slaty beds with, as a rule, few 
fossils except abundant worm-tracks. In the lowest beds of this 
series we meet with traces of contemporaneous voicanic action; but 
volcanic action was, on the whole, little rife during their deposition. 
3. Below comes a thick series of red sandstones, with numerous 
ash-bands, well exposed north of Drom Point and south of Mill 
Cove. ‘These beds have yielded no fossils. 
2. Below comes the Clogher-Head Series, a remarkable and 
varied succession of ashes and rhyolites, alternating with calcareous 
flags and slates, containing fossils mainly of Wenlock type. ‘The 
igneous rocks largely preponderate over the sedimentaries in the 
southern part of the area. They overlie: 
1. The Ferriter’s-Cove Beds, a thick series of calcareous 
sandstones and flags with subordinate ash-bands. The fauna, 
though in the main of Wenlock type, contains some species which 
are generally regarded as distinctly Llandovery (see § IV, below). 
The Ferriter’s-Cove Beds rest with apparent conformity upon the 
unfossiliferous Smerwick Beds. | 
IV. Furtruer ReEmMARKs oN THE Fossits. 
Mr. F. R. Cowper Reed ! writes :— 
‘ The facies of the fauna from all the localities is Silurian ; I have not seen any 
fossils that would lead me to suspect the presence of Ordovician beds.’ 
The distribution of the fossils shows, however, several anomalous 
features. Thus Pentamerus oblongus and Stricklandinia lens, which 
are generally characteristic of the Llandovery, occur in the south- 
western corner of Ferriter’s Cove, in beds the general facies of whose 
fauna is more of Wenlock type. At a slightly lower horizon, on 
the other side of the Cove, Stricklandinia lirata occurs associated 
with fossils of Wenlock type. On the other hand, at one of the 
exposures in the stream which flows from Ballynahow Common to 
jom the Dunquin River, Pentamerus undatus and Orthis calligramma 
var. Davidsoni, both forms not generally met with above the 
Llandovery, occur associated with so typical a Ludlow form as 
_* Mr. Reed has, as on three former occasions, most kindly examined our 
fossils for us. We are very greatly indebted to him. 
